What is the CVSS score of CVE-2026-21504?

CVE-2026-21504 has a CVSS 3.1 base score of 6.6 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H. EPSS exploitation probability: 0.0%.

Which versions of Iccdev are affected by CVE-2026-21504?

CVE-2026-21504 presents notable security risk, a heap-based buffer overflow vulnerability rated CVSS 6.6. Exploitation could cause memory corruption or application crashes.. A patch is available.

Is there a public PoC exploit available for CVE-2026-21504?

Yes, a public proof-of-concept exploit is available for CVE-2026-21504. Prioritise patching immediately. EPSS: 0.0%.

Iccdev CVE-2026-21504

MEDIUM

Heap-based Buffer Overflow (CWE-122)

2026-01-07 security-advisories@github.com

Buffer Overflow Iccdev

6.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.6 MEDIUM

AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 09, 2026 - 21:34 vuln.today

Public exploit code

Patch released

Jan 09, 2026 - 21:34 nvd

Patch available

CVE Published

Jan 07, 2026 - 18:15 nvd

MEDIUM 6.6

DescriptionGitHub Advisory

iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of ICC color management profiles. Prior to version 2.3.1.2, iccDEV is vulnerable to heap buffer overflow in the ToneMap parser. This issue has been patched in version 2.3.1.2.

AnalysisAI

Heap buffer overflow in iccDEV's ToneMap parser (versions prior to 2.3.1.2) allows local attackers with user interaction to achieve information disclosure and denial of service, with potential for code execution. Public exploit code exists for this vulnerability. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.6 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-21504 vulnerability details – vuln.today

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